Screen



FIG. 1 is a front elevational view of the screen of the present invention;

FIG. 2 is a rear elevational view of the screen of FIG. 1;

FIG. 3 is a top plan view of the screen of FIG. 1, the bottom view being a mirror image thereof;

FIG. 4 is a left side elevational view of the screen of FIG. 1, the right view being a mirror image thereof; and,

FIG. 5 is a front elevational view of the screen of FIG. 1.

The broken lines showing of the letters, numbers and symbols in FIGS. 1,2 and 5 and the door frame in FIG. 5 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a screen, as shown and described. 